One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(9,10)(11,15)(12,13)(14,16)(17,18)(19,27)(20,23)(21,31)(22,25)(24,29)(26,28)(30,32) involution — undirected(1,2,3,4)(5,6)(7,8)(10,13)(14,15)(17,19,28,30,22,29,21,20)(18,23,31,24,25,32,26,27)(6,8)(17,20,21,29,22,30,28,19)(18,24,26,23,25,27,31,32)(9,11,12,16)(10,14,13,15)(18,25)(23,32)(24,27)(26,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.